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Home >> Mitsubishi >> 2012 >> Galant L4-2.4L (4G69) >> Repair and Diagnosis >> Body and Frame >> Body Control Systems >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Central Door Locking System >> Inspection Procedure C-2

Inspection Procedure C-2




INSPECTION PROCEDURE C-2: Central Door Locking System: Some Doors do not Lock or Unlock.






































CIRCUIT OPERATION

- The ETACS-ECU operates the central door lock system according to the following signals:
- Front door lock actuator switch
- Door lock key cylinder switch
- Door lock switch, which is incorporated in the power window main switch or front power window sub switch
- The ETACS-ECU locks or unlocks all the doors (except liftgate and glass hatch lock) by operating the central door lock relay (incorporated in the ECU) in response to input signals.

TECHNICAL DESCRIPTION (COMMENT)

The wiring harness between the ETACS-ECU and the door lock actuator may be defective.

TROUBLESHOOTING HINTS

- The front door lock actuator or rear door lock actuator may be defective
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
- The ETACS-ECU may be defective

DIAGNOSIS

Required Special Tool:

- MB991223: Harness Set
- MB992006: Extra Fine Probe

STEP 1. Check which door lock is defective.

Q. Which of the door locks is defective?

Driver's door : Go to Step 2.
Front passenger's door : Go to Step 7.
Rear door (LH) : Go to Step 11.
Rear door (RH) : Go to Step 15.
STEP 2. Check front door lock actuator (LH) connector E-15 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is front door lock actuator (LH) connector E-15 in good condition?

YES Go to Step 3.

NO Repair or check the connector. Harness Connector Inspection.
Verify that all the doors can be locked and unlocked normally.

STEP 3. Check the front door lock actuator (LH).





Remove the front door lock actuator (LH). The illustration shows when the door lock actuator is viewed from inside the door. Service and Repair.





Q. Does the front door lock actuator (LH) work normally?

YES Go to Step 4.

NO Replace the front door lock actuator (LH). Verify that all the doors can be locked and unlocked normally.

STEP 4. Check ETACS-ECU connectors C-217 and C-219 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Are ETACS-ECU connectors C-217 and C-219 in good condition?

YES Go to Step 5.

NO Repair or check the connector. Harness Connector Inspection.
Verify that all the doors can be locked and unlocked normally.

STEP 5. Check the wiring harness between ETACS-ECU connector C-217
(terminal 22) and front door lock actuator (LH) connector E-15 (terminal 4).

- Check the communication lines for open circuit and short circuit.













NOTE:
Also check intermediate connector C-26 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-26 is damaged, repair or replace the damaged component(s) as described in Harness Connector Inspection Harness Connector Inspection.

Q. Is the wiring harness between ETACS-ECU connector C-217 (terminal 22) and front door lock actuator (LH) connector E-15 (terminal 4) in good condition?

YES Go to Step 6.

NO The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair or replace the damaged component(s). Verify that the central door locking system works normally.

STEP 6. Check the wiring harness between ETACS-ECU connector C-219
(terminal 12) and front door lock actuator (LH) connector E-15 (terminal 6).

- Check the communication lines for open circuit and short circuit.

















NOTE:
Also check intermediate connector C-26 and junction block connector C-211 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-26 or junction block connector C-211 is damaged, repair or replace the damaged component(s) as described in Harness Connector Inspection Harness Connector Inspection.

Q. Is the wiring harness between ETACS-ECU connector C-219 (terminal 12) and front door lock actuator (LH) connector E-15 (terminal 6) in good condition?

YES Replace the ETACS-ECU. When the ETACS-ECU is replaced, register the encrypted code. Encrypted Code Registration Criteria Table.
Verify that all the doors can be locked and unlocked normally.

NO The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair or replace the damaged component(s). Verify that the central door locking system works normally.

STEP 7. Check front door lock actuator (RH) connector E-05 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is front door lock actuator (RH) connector E-05 in good condition?

YES Go to Step 8.

NO Repair or replace the damaged component(s). Harness Connector Inspection. Verify that all the doors can be locked and unlocked normally.

STEP 8. Check the front door lock actuator (RH).





Remove the front door lock actuator (RH). The illustration shows when the door lock actuator is viewed from inside the door. Service and Repair.





Q. Is the front door lock actuator (RH) normal?

YES Go to Step 9.

NO Replace the front door lock actuator (RH). Verify that all the doors can be locked and unlocked normally.

STEP 9. Check ETACS-ECU connector C-219 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is ETACS-ECU connector C-219 in good condition?

YES Go to Step 10.

NO Repair or replace the damaged component(s). Harness Connector Inspection. Verify that all the doors can be locked and unlocked normally.

STEP 10. Check the wiring harness between ETACS-ECU connector C-219
(terminals 12 and 13) and front door lock actuator (RH) connector E-05 (terminals 4 and 6).

- Check the communication lines for open circuit and short circuit.

















NOTE:
Also check intermediate connector C-12 and junction block connector C-211 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-12 or junction block connector C-211 is damaged, repair or replace the damaged component(s) as described in Harness Connector Inspection Harness Connector Inspection.

Q. Is the wiring harness between ETACS-ECU connector C-219 (terminals 12 and 13) and front door lock actuator (RH) connector E-05 (terminals 4 and 6) in good condition?

YES Replace the ETACS-ECU. When the ETACS-ECU is replaced, register the encrypted code. Encrypted Code Registration Criteria Table.
Verify that all the doors can be locked and unlocked normally.

NO The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.

STEP 11. Check rear door lock actuator (LH) connector E-18 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is rear door lock actuator (LH) connector E-18 in good condition?

YES Go to Step 12.

NO Repair or replace the damaged component(s). Harness Connector Inspection. Verify that all the doors can be locked and unlocked normally.

STEP 12. Check the rear door lock actuator (LH).





Remove the rear door lock actuator (LH). The illustration shows when the door lock actuator is viewed from outside the door. Service and Repair.





Q. Does the rear door lock actuator (LH) work normally?

YES Go to Step 13.

NO Replace the rear door lock actuator (LH). Verify that all the doors can be locked and unlocked normally.

STEP 13. Check ETACS-ECU connector C-219 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is ETACS-ECU connector C-219 in good condition?

YES Go to Step 14.

NO Repair or replace the damaged component(s). Harness Connector Inspection. Verify that all the doors can be locked and unlocked normally.

STEP 14. Check the wiring harness between ETACS-ECU connector C-219
(terminals 12 and 13) and rear door lock actuator (LH) connector E-18 (terminals 4 and 6).

- Check the communication lines for open circuit and short circuit.

















NOTE:
Also check intermediate connector D-19 and junction block connector C-204 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-19 or junction block connector C-204 is damaged, repair or replace the damaged component(s) as described in Harness Connector Inspection Harness Connector Inspection.

Q. Is the wiring harness between ETACS-ECU connector C-219 (terminals 12 and 13) and rear door lock actuator (LH) connector E-18 (terminals 4 and 6) in good condition?

YES Replace the ETACS-ECU. When the ETACS-ECU is replaced, register the encrypted code. Encrypted Code Registration Criteria Table.
Verify that all the doors can be locked and unlocked normally.

NO The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that all the doors can be locked and unlocked.

STEP 15. Check rear door lock actuator (RH) connector E-08 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is rear door lock actuator (RH) connector E-08 in good condition?

YES Go to Step 16.

NO Repair or replace the damaged component(s). Harness Connector Inspection. Verify that all the doors can be locked and unlocked normally.

STEP 16. Check the rear door lock actuator (RH).





Remove the rear door lock actuator (RH). The illustration shows when the door lock actuator is viewed from outside the door. Service and Repair.





Q. Does the rear door lock actuator (RH) work normally?

YES Go to Step 17.

NO Replace the rear door lock actuator (RH). Verify that all the doors can be locked and unlocked normally.

STEP 17. Check ETACS-ECU connector C-219 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is ETACS-ECU connector C-219 in good condition?

YES Go to Step 18.

NO Repair or replace the damaged component(s). Harness Connector Inspection. Verify that all the doors can be locked and unlocked normally.

STEP 18. Check the wiring harness between ETACS-ECU connector C-219
(terminals 12 and 13) and rear door lock actuator (RH) connector E-08 (terminals 6 and 4).

- Check the communication lines for open circuit and short circuit.

















NOTE:
Also check junction block connector C-204 and intermediate connectors D-36 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If junction block connector C-204 or intermediate connector D-36 is damaged, repair or replace the damaged component(s) as described in Harness Connector Inspection Harness Connector Inspection.

Q. Is the wiring harness between ETACS-ECU connector C-219 (terminals 12 and 13) and rear door lock actuator (RH) connector E-08 (terminals 6 and 4) in good condition?

YES Replace the ETACS-ECU. When the ETACS-ECU is replaced, register the encrypted code. Encrypted Code Registration Criteria Table.
Verify that all the doors can be locked and unlocked normally.

NO The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that all the doors can be locked and unlocked normally.

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